Author
Topic: Muncie M-21 Help (Read 2959 times)

During hard de-accelleration in fourth gear @high RPM and let off the gas, my transmission jumps out of gear. Fourth gear and only fourth gear. Does anyone else have the same sympton and does anyone know the fix?

It's not the synchros, it's the 3-4 slider that causes that. The brass rings slow the gear down so it can go into the next gear. When a trans grinds when going into gear, that is the brass rings going bad.